Implemented advanced printer selection and API refactoring.

1. Added past printer history tracking and merging favorite printers
   with discovered printers.

2. Added save as PDF support.

3. Added all printers activity with search capability and optional
   add printers chooser (if any print service provides add printers
   activity)

4. Refactored the printer discovery session APIs. Now one session
   can have multiple window discovery windows and the session stores
   the printers found during past discovery periods.

5. Merged the print spooler and the print spooler service - much
   simpler and easier to maintain.

Change-Id: I4830b0eb6367e1c748b768a5ea9ea11baf36cfad
diff --git a/packages/PrintSpooler/AndroidManifest.xml b/packages/PrintSpooler/AndroidManifest.xml
index c00639d..1f10af8 100644
--- a/packages/PrintSpooler/AndroidManifest.xml
+++ b/packages/PrintSpooler/AndroidManifest.xml
@@ -18,7 +18,7 @@
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
         package="com.android.printspooler"
-        android:sharedUserId="android.uid.printspooler"
+        android:sharedUserId="android.uid.system"
         android:versionName="1"
         android:versionCode="1"
         coreApp="true">
@@ -51,9 +51,10 @@
         </activity>
 
         <activity
-            android:name=".ChoosePrinterActivity"
-            android:exported="false"
-            android:theme="@android:style/Theme.Holo.Light">
+            android:name=".SelectPrinterActivity"
+            android:label="@string/all_printers_label"
+            android:theme="@style/SelectPrinterActivityTheme"
+            android:exported="false">
         </activity>
 
         <receiver